Canada’s immunity task force takes aim at pressing COVID-19 questions

Somerset Street West at Queen Elizabeth Drive is seen in Ottawa

After one week on the job, members of the federal government’s new immunity task force say they are coming to grips with a towering wall of uncertainty that obscures the true extent of COVID-19 in Canada.

With more than 50,000 confirmed cases across the country and likely many more that have gone unreported, scientists are certain there is a population of individuals in Canada that have acquired some level of immunity to the new coronavirus that causes COVID-19. What remains unclear is the size and makeup of that population, the level of immunity it has developed and for how long.